Pull-socket.



H. HUBBELL.

PULL SOCKET.

nrmonmn 111121) 001.1%, 1911.

Patented June 17, 1913.

. W Il/lll/Illlllll 7 l I INVENTOR 7 ATTORNEY WITNESSES:

)7 z ZJJJQ/M HARVEY HUFBELII, OF BRIDGEFORII, CONNECTICUT.

PULL-SOCKET- Speoiflonti'on of Letters Patent.

Application filed October 3, 1911.

Patented J une 1'7, 1913.-

Sofia-1N0. 652,671.

To all wit-0m it may concern:

Be it known that 1', HARVEY HUBBELL, a citizen of the United States, residing at Bridgeport, county of Fairfield, State of Connecticut have invented an Improvement in Pull-Sockets, of which the following is a specification.

This invention has for its object to provide a pull socket in which the construction shall be simplified, the number of parts and the cost of production reduced to the mini mum and in which the operating chain shall not pass within the shell, my present construction enabling me to dispense with the usual guide for the chain, to make the socket reversible and furthermore to practically eliminate danger of the mechanism getting out of order in use.

With these and other objects in view I have devised the novel pull socket, of which the following description in connection with the accompanying drawing is a specification, reference characters being used to indicate the several parts.

Figure 1 is a view partly in elevation and partly in longitudinal section on the line 1-1 in Fig. 2 looking in the direction of the arrows, illustrating the construction and operation of my novel switch; Fig; 2 a plan view of the lower insulating block, the brackets being in, section; Fig. 3 an edge view of the lower insulating block detached; Fig. 4 a vertical section of the switch mechanism with the operating mechanism removed, the position of the parts corresponding with Fig. 1; F ig'. 5 a plan view of the contact plate detached; Fig. 6 a plan view of the operating plate and insulating link detached; Fig. 7 an edge view of the operating plate with the insulating link removed; Fig. 8 an end view of the reversible carrying plate detached; Fig. 9 an elevation of the carrying plate detached; and Fig. 10 is an elevation of a pull socket corresponding with Fig. 1 but showing the operating lever reversed.

10 denotes the socket shell, 11 the ca 12' the insulating lining, 13 the screw shel 14 and 15 insulating blocks which I term for convenience upper and lower insulating blocks respectively, and 16 the brackets by which the insulating blocks are connected. The lower insulating block is provided with inclines 17 which terminate in abrupt shoulders, alternate inclines carrying plates 18 which are in the circuit. The contact plate "is swiveled'.

pin, the spring additionally acting to hold the angular head of the in in a socket in the upper insulating blocli which retains it against rotation.

Further description of the switch mechanism is not thought to be required as it has been illustrated, described and claimed in various patents heretofore granted to me.

The essential feature of the resent invention is that I dispense with t e use of a chain guide and connect the chain, outside the socket shell, to an operating lever of peculiar design, broadly a bell crank lever, which is pivoted within the socket shell but is provided with an arm projecting through a slot to which the chain or cord is attached. In order to enable me to produce a construction in which the operating lever shall be pivoted within the socket shell but no chain or cord shall enter the shell, I have rearranged the parts and have placed the switchmechanism out of center, that is at one side of the space between the insulating blocks.

24 denotes the operating chain or cord, 25 the operating lever to whlch it is connected and 27 a reversible plate to which the operatin lever is pivoted, as at 56.

28 enotes an insulating link one end of \vhich is pivoted to operating plate 20 and the other to a yoke 33'. The operating lever,

which as alread stated is a bell crank lever,

extends inward y obliquely from its pivotal point on the reversihle late and is engaged at the angle b I a hook 4 on which yoke 33 rom the point of attachment of book 34, the lever extends outward through a slot 32' in the socket shell and terminates in an arm 29 which preferably normally lies close to and substantially parallel with the outer side of the socket shell, as

clearly shown in Figs. 1 and 10. The special construction of these parts is not of the is engaged and opessence of the invention so long as the yoke to which the insulating link is connected has a swiveled connection with the operating lever so as to permit said lever and plate 27 to be reversed. In the present instance, I have shown hook 34 as engaging a hole 35 in the operating lever. The reversible plate is blanked out from sheet metal and is provided with a central opening 36 through which the angle of the bell crank operating lever projects, as clearly shown in Fig. 1. The ends of the reversible plate enga 'e re cesses 30 in the edges of the upper andlower insulating blocks and are provided on their sides with tongues 31 which are turned inward, as shown in F 8, so as to just pass between the insulating blocks and act in connection with brackets 16 to retain them spaced apart. Tongues 31 are not connected to the insulating blocks but resist any strain tending to move said blocks toward each other.

It is of course necessary that under all circumstances the free end of the operating lever projects upward, so that a downward pull upon an operating chain or cord connected thereto will swing the operating plate backward and the return movement of said plate caused by spring 23 will carry the contact plate forward, which will open or close the circuit. As it is quite common for lamp bulbs to project upward leaving the cap end of the socket shell downward, it is necessary to rovide for reversing the operatin lever. In my present structure, the socket s ell being removed, in order to reverse the lever from the position shown in Fig. 1 to the position shown in Fig. 10, or vice versa, it is simply necessary to draw the operating lever and reversible plate outward against the power of spring 23 far enough to disengage said plate from the insulating blocks and then give the plate and operating lever a half turn, hook 34 swiveling in the yoke, and then permit the 5 ring to return the parts of the switch to t1eir normal position and also drawing the reversible plate (carrying with it the operating lever) into engagement with the recesses in the insulating block.

Having thus described the invention I claim:

1. In a pull socket, the combination with spaced apart insulating blocks, a switch mechanism at one side of the space and a shell, of a reversible operating lever pivoted within the shell and extending outside thereof and means for connecting said lever and the switch mechanism.

2. In a pull socket, the combination with spaced apart insulating blocks, a switch mechanism at one side of the space and a shell having a slot, of an operating lever pivoted within the shell and havin an arm extending through the slot and a link having a swiveled connection with said lever and also connected with said switch mechanism.

3. In a pull socket, the combination with insulating blocks, a shell and a reversible operating lever, of a switch mechanism placed at one side of the space between said.

blocks so as to permit the 'operatin lever to be pivoted within the shell and a ink connecting the operating lever and the switch mechanism.

4; In a pull socket, the combination with insulating blocks, a shell and switch mechanism, of an operating lever, a reversible plate to which said lever is pivoted within the shell and an insulating connection be tween said lever and the switch mechanism.

5. In a pull socket, the combination with insulating blocks, a shell and switch mechanism, of an operating lever, a reversible plate to which said lever is pivoted within the shell and a connection between the lever and the switch mechanism consisting of an insulating link, a yoke pivoted thereto, and a hook swiveled in the yoke and engaging the operatin lever.

G. In a pu ll socket, the combination with insulating blocks, a shell having a slot and switch mechanism, of a bell crank operating lever having an arm extendin through said slot, a reversible plate to which said lever is pivoted and a connection between the lever and the switch mechanism consisting of an insulating link, a yoke pivoted thereto and a hook swiveled in the yoke and connected to the operating lever.

7. In a ull socket, the combination with insulating blocks, a shell and switch mechanism, of an operatin lever; a reversible plate to which said Icver is pivoted and which is provided with tongues lying between the insulating blocks, for the purpose set forth, and an insulating connection between the operating lever and the switch mechanism.

8. In a pull socket, the combination with insulating blocks, a shell and switch mechanism, of a reversible plate having a central opening, a bell crank operating lever pivoted to said plate and having an angle extending throu h the opening and an arm extending outside the shell and" an insulating swiveled connection between the operating lever and the switch mechanism.

In testimony whereof I alfix my. signature in presence of two witnesses.

HARVEY HUBBELL.

\Vitnesses A. M. Woos'rnn, S. W. ATHERTON. 

